Carbon nanotubes as a nanocatalyst and nanoreactor for the efficient treatment of pharmaceutical wastewater <i>via</i> CaSO<sub>3</sub> activation

Wang, Haoqi; Liu, Xiaohong; Wang, Yanlan; Tian, Yiqun; Huang, Yingping; Huang, Di; Liu, Xiang

doi:10.1039/d4en00026a

Environ. Sci.: Nano

2024

DOI: 10.1039/d4en00026a

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Carbon nanotubes as a nanocatalyst and nanoreactor for the efficient treatment of pharmaceutical wastewater via CaSO₃ activation

Haoqi Wang,

Xiaohong Liu,

Yanlan Wang

et al.

Abstract: Recently, calcium sulfite (CaSO3) has been increasingly considered to be as the most potential substitution of PMS/PDS to produce SO4-• for degrading the target organic pollutants due to its less...

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Cited by 4 publications

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Designing carbon-based catalysts for enhanced sulfite activation: Strategies for pollutant degradation

Jiang,

Guan,

Chen

et al. 2024

Journal of Environmental Chemical Engineering

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Designing carbon-based catalysts for enhanced sulfite activation: Strategies for pollutant degradation

Jiang,

Guan,

Chen

et al. 2024

Journal of Environmental Chemical Engineering

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Synthesis of N-doped porous biochar from chemical pollutant for efficient sulfadiazine degradation: Performance, mechanism and bio-toxicity assessment

Li,

Fu,

Yan

et al. 2025

Separation and Purification Technology

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Insights into the Removal of Organic Contaminants by Co-CeO₂ Nanocatalysts via CaCO₃ Activation: Performance, Kinetic, and Mechanism

Li,

Niu,

Yan

et al. 2024

Langmuir

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The advanced oxidation process based on S(IV) has garnered increasing attention, owing to its efficiency in degrading contaminants. Here, a cobalt-doped cerium oxide catalyst (Co-CeO 2 ) was employed to activate calcium sulfite (CaSO 3 ) for imidacloprid degradation. The Co-CeO 2 catalyst was characterized by using SEM, BET, XRD, and XPS techniques to analyze its structural and chemical properties. XPS analysis revealed the presence of Co 0 , Co 2+ , and Co 3+ species in the Co-CeO 2 catalyst. Compared to the CeO 2 /CaSO 3 system, the Co-CeO 2 /CaSO 3 system significantly enhanced the degradation rate of imidacloprid from 5.00% to 94.01%. Scavenging experiments, in conjunction with electron paramagnetic resonance spectroscopy, identified hydroxyl radicals ( • OH), sulfate radicals (SO 4•− ), superoxide radicals (O 2 •− ), sulfite radicals (SO 3•− ), and singlet oxygen ( 1 O 2 ) as the primary reactive species responsible for the degradation of imidacloprid within the Co-CeO 2 /CaSO 3 system. Density functional theory calculation analysis was employed to investigate the specific sites of imidacloprid attacked by reactive oxygen species, proposing four potential degradation pathways. Furthermore, the Ecological Structure Activity Relationships (ECOSAR) program predicted a significant diminution in the toxicity of intermediate products compared to imidacloprid. Even after five cycles, Co-CeO 2 maintained an excellent removal efficiency of 86.35%.

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Carbon nanotubes as a nanocatalyst and nanoreactor for the efficient treatment of pharmaceutical wastewater via CaSO₃ activation

Abstract: Recently, calcium sulfite (CaSO3) has been increasingly considered to be as the most potential substitution of PMS/PDS to produce SO4-• for degrading the target organic pollutants due to its less...

Cited by 4 publications

References 70 publications

Designing carbon-based catalysts for enhanced sulfite activation: Strategies for pollutant degradation

Designing carbon-based catalysts for enhanced sulfite activation: Strategies for pollutant degradation

Synthesis of N-doped porous biochar from chemical pollutant for efficient sulfadiazine degradation: Performance, mechanism and bio-toxicity assessment

Insights into the Removal of Organic Contaminants by Co-CeO₂ Nanocatalysts via CaCO₃ Activation: Performance, Kinetic, and Mechanism

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Carbon nanotubes as a nanocatalyst and nanoreactor for the efficient treatment of pharmaceutical wastewater via CaSO3 activation

Abstract: Recently, calcium sulfite (CaSO3) has been increasingly considered to be as the most potential substitution of PMS/PDS to produce SO4-• for degrading the target organic pollutants due to its less...

Cited by 4 publications

References 70 publications

Designing carbon-based catalysts for enhanced sulfite activation: Strategies for pollutant degradation

Designing carbon-based catalysts for enhanced sulfite activation: Strategies for pollutant degradation

Synthesis of N-doped porous biochar from chemical pollutant for efficient sulfadiazine degradation: Performance, mechanism and bio-toxicity assessment

Insights into the Removal of Organic Contaminants by Co-CeO2 Nanocatalysts via CaCO3 Activation: Performance, Kinetic, and Mechanism

Contact Info

Product

Resources

About

Carbon nanotubes as a nanocatalyst and nanoreactor for the efficient treatment of pharmaceutical wastewater via CaSO₃ activation

Insights into the Removal of Organic Contaminants by Co-CeO₂ Nanocatalysts via CaCO₃ Activation: Performance, Kinetic, and Mechanism